Top portion of a keyboard surface



FIG. 1 is a top plan view of a top portion of a keyboard surface showing our design;

FIG. 2 is a front side elevational view thereof;

FIG. 3 is a rear side elevational view thereof;

FIG. 4 is a left side elevational view thereof;

FIG. 5 is a right side elevational view thereof; and,

FIG. 6 is a top plan view of an alternate embodiment thereof wherein the only difference is in the omission of the characters.

The shading in the top plan views is illustrative of color. 

The ornamental design for a top portion of a keyboard surface, as shown and described. 